In this example, fs. The success callback for getFile receives a FileEntry object. You can use this to perform file write and file read operations. Here is an example of a request for temporary storage. Temporary storage may be deleted by the operating system if the device runs low on memory.
When you are using temporary storage, you can create or get the file by calling getFile. As in the persistent storage example, this will give you a FileEntry object that you can use for read or write operations. Once you have a FileEntry object, you can write to the file by calling createWriter , which returns a FileWriter object in the success callback.
Call the write method of FileWriter to write to the file. You also need a FileEntry object to read an existing file. Use the file property of FileEntry to get the file reference, and then create a new FileReader object. You can use methods like readAsText to start the read operation.
When the read operation is complete, this. Of course, you will often want to append existing files instead of creating new ones. Here is an example of that. This example shows another way that you can access the file system using window. In this example, pass the cross-platform Cordova file URL, cordova. The success callback receives a DirectoryEntry object, which you can use to do things like create a file.
In addition to this usage, you can use resolveLocalFileSystemURL to get access to some file system locations that are not part of the sandboxed storage system. See Where to store Files for more information; many of these storage locations are platform-specific.
For the append operation, there is nothing new in the createFile function that is called in the preceding code see the preceding examples for the actual code. In writeFile , you check whether an append operation is requested. Once you have a FileWriter object, call the seek method, and pass in the index value for the position where you want to write.
In this example, you also test whether the file exists. After calling seek, then call the write method of FileWriter. We already showed how to write to a file that you just created in the sandboxed file system. What if you need to get access to an existing file and convert that to something you can store on your device? In this example, you obtain a file using an xhr request, and then save it to the cache in the sandboxed file system. Before you get the file, get a FileSystem reference using requestFileSystem.
By passing window. For completeness, here is the xhr request to get a Blob image. There is nothing Cordova-specific in this code, except that you forward the DirectoryEntry reference that you already obtained as an argument to the saveFile function. You will save the blob image and display it later after reading the file to validate the operation. After getting the file, copy the contents to a new file.
The current DirectoryEntry object is already associated with the app cache. In writeFile, you pass in the Blob object as the dataObj and you will save that in the new file. After writing to the file, read it and display it. Cordova uses Git to retrieve any required Cordova source files from a repository when you package the application as a native mobile application.
If you are behind a proxy you will need to configure node. For additional information about configuring node. Confirm that your proxy configuration is correct if you see an error message in the terminal window when you run the install command. If you are behind a proxy you will need to configure Git to use the proxy to access the network.
You now have all the tools that you need to develop and package a native mobile application in the IDE. In the next exercise you will use the New Project wizard to create the application. You create a Cordova application by selecting the Cordova Hello World template as the site template in the New Project wizard. A Cordova application is an HTML5 application with some additional libraries and configuration files.
For this tutorial you will create a very basic HTML5 project that has an index. You will select some jQuery JavaScript libraries when you create the project in the wizard. Click Next. Type CordovaMapApp for the Project Name and specify the directory on your computer where you want to save the project.
In Step 3. Note: You must be online to create a project that is based on one of the online templates in the list. In Step 4. For this tutorial you will use the "minified" versions of the JavaScript libraries.
You can use the text field in the panel to filter the list of JavaScript libraries. For example, type jq in the field to help you find the jquery libraries. You can Ctrl-click the names of the libraries to select multiple libraries. You can click on the library version number in the Version column to open a popup window that enables you to select older versions of the library. By default the wizard displays the most recent version. The minimized versions of the JavaScript libraries are compressed versions and the code is not comprehensible when viewed in an editor.
In Step 5. Cordova Support, use the default values. Click Finish to complete the wizard. When you click Finish the IDE creates the project and displays a node for the project in the Projects window and opens the index. You can remove a JavaScript library from a project by right-clicking the JavaScript file and choosing Delete in the popup menu. To add a JavaScript library to a project, right-click the project node and choose Properties to open the Project Properties window.
Alternatively, you can copy a JavaScript file that is on your local system directly into the js folder. You can now test that your project runs and is deployed to the emulator for your target mobile device. Click the browser select icon in the toolbar and confirm that your target mobile device emulator is selected in the Cordova column in the table. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
The Overflow Blog. Podcast Who is building clouds for the independent developer? Exploding turkeys and how not to thaw your frozen bird: Top turkey questions Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Download the source code and develop further navigation and listing of the directory with the click 10 Apr Experience Manager Mobile specific Cordova-enabled plugins are a set of JavaScript Content WebView — The content displayed in the webview.
How to do this same thing using only cordova plugin not ionic. Ionic is an open source framework, and the most popular cross-platform mobile app framework. Ionic cordova platform -- add Android; Ionic cordova platform -- add browser The File Transfer plugin allows you to upload a file and download a file.
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